6. You aren't obligated to choose your spouse over your friends.
You can do certain things when you're just dating someone that you can't do when you're married to them. For instance, when you haven't put a ring on it, you can take a girls' trip to Costa Rica over Christmas, and though your significant other might be irked, oh well — it's not like you're married.
When you're married? Yup, enjoy watching your friends' Instagram feeds flood with photos of tropical paradise while you hang out at your in-laws' house.